Speaking to Sky Blue Player after the defeat, Boothroyd said: "It frustrates and irritates me because our second half performance was light years ahead of the first.
"We created untold chances in the second half and tonight is a lesson we need to heed because we are not bad when we get our act together.
"We have some very talented players in our dressing room but no matter what you do, whether that be an interviewer or a manager or a footballer, if you don't apply yourself every second of every day you won't be all you can be."
Picture copyright of Covsupport News Service. Credit CNS/KM
Picture copyright of Covsupport News Service. Credit CNS/KM